Applied Physiology Laboratory, Department of Exercise and Sport Science, University of North Carolina Chapel Hill, Chapel Hill, North Carolina, USA.
J Strength Cond Res. 2012 Oct;26(10):2798-805. doi: 10.1519/JSC.0b013e318267922b.
The use of β-alanine in sport is widespread. However, the effects across all sport activities are inconclusive. The purpose of this study was to evaluate the effects of β-alanine supplementation on high-intensity running performance and critical velocity (CV) and anaerobic running capacity (ARC). Fifty recreationally trained men were randomly assigned, in a double-blind fashion, to a β-alanine group (BA, 2 × 800 mg tablets, 3 times daily; CarnoSyn; n = 26) or placebo group (PL, 2 × 800 mg maltodextrin tablets, 3 times daily; n = 24). A graded exercise test (GXT) was performed to establish peak velocity (PV). Three high-speed runs to exhaustion were performed at 110, 100, and 90% of PV, with 15 minutes of rest between bouts. The distances achieved were plotted over the time to exhaustion (TTE). Linear regression was used to determine the slope (CV) and y-intercept (ARC) of these relationships to assess aerobic and anaerobic performances, respectively. There were no significant treatment effects (p > 0.05) on CV or ARC for either men or women. Additionally, no TTE effects were evident for bouts at 90-110%PV lasting 1.95-5.06 minutes. There seems to be no ergogenic effect of β-alanine supplementation on CV, ARC, or high-intensity running lasting approximately 2-5 minutes in either men or women in the current study.
β-丙氨酸在运动中的应用非常广泛。然而，其对所有运动项目的影响尚无定论。本研究旨在评估β-丙氨酸补充对高强度跑步表现和临界速度（CV）及无氧跑步能力（ARC）的影响。50 名有规律运动的男性被随机分为β-丙氨酸组（BA，2×800mg 片剂，每日 3 次；CarnoSyn；n=26）或安慰剂组（PL，2×800mg 麦芽糊精片剂，每日 3 次；n=24），以双盲方式进行。进行分级运动测试（GXT）以确定峰值速度（PV）。进行 3 次高速至力竭的跑步，速度分别为 110%、100%和 90%的 PV，两次之间休息 15 分钟。记录达到的距离与力竭时间（TTE）的关系。线性回归用于确定这些关系的斜率（CV）和截距（ARC），以分别评估有氧和无氧表现。无论男性还是女性，CV 或 ARC 均无显著的治疗效果（p＞0.05）。此外，90-110%PV 之间的持续时间为 1.95-5.06 分钟的冲刺，也没有 TTE 效果。在本研究中，β-丙氨酸补充似乎对男性或女性持续约 2-5 分钟的 CV、ARC 或高强度跑步没有任何的增强作用。
